Alexander Berkman

The People-the toilers of the world, the producers-comprise, to me, the universe. They alone count. The rest are parasites, who have no right to exist. But to the People belongs the earth-by right, if not in fact. To make it so in fact, all means are justifiable; nay, advisable, even to the point of taking life. The question of moral right in such matters often agitated the revolutionary circles I used to frequent. I had always taken the extreme view. The more radical the treatment, I held, the quicker the cure. Society is a patient; sick constitutionally and functionally. Surgical treatment is often imperative. The removal of a tyrant is not merely justifiable; it is the highest duty of every true revolutionist. Human life is, indeed, sacred and inviolate. But the killing of a tyrant, of an enemy of the People, is in no way to be considered as the taking of a life. A revolutionist would rather perish a thousand times than be guilty of what is ordinarily called murder. In truth, murder and Attentat' are to me opposite terms. To remove a tyrant is an act of liberation, the giving of life and opportunity to an oppressed people. True, the Cause often calls upon the revolutionist to commit an unpleasant act; but it is the test of a true revolutionist-nay, more, his pride-to sacrifice all merely human feeling at the call of the People's Cause. If the latter demand his life, so much the better. 

 http://dwardmac.pitzer.edu/Anarchist_Archives/bright/berkman/prison/toc.html